Quantum DLT-S4 Guía de usuario Pagina 375

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Chapter 4 SCSI Commands
WRITE BUFFER Command (3Bh)
DLT-S4 Interface Reference Guide 341
WRITE BUFFER Command (3Bh) 4
The WRITE BUFFER command works with the READ BUFFER command
as a diagnostic function for testing the device data buffer, DMA engine,
interface hardware, and interface network integrity. It is also used to
download and update microcode (firmware).
Figure 172 WRITE BUFFER
Command Descriptor Block
Data Format
Bit
7 6 5 4 3 2 1 0
Byte
0 Operation Code (3Bh)
1 Reserved Mode
2 Buffer ID (00h)
3 — 5
(MSB)
Buffer Offset
(LSB)
6 — 8
(MSB)
Parameter List Length
(LSB)
9 Control
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